Shadows appear when printing out

If your HP Color LaserJet 4700 is printing with shadows, it could be caused by a few different issues. Here are a few potential causes:

1. Toner Cartridges: The toner cartridges may be low or empty, causing the shadows to appear. It is recommended to check the toner levels and replace the cartridges if necessary.
2. Toner Smears: The toner smears on the drum or the fuser can cause shadows to appear on the printouts. Clean the drum and fuser with a lint-free cloth and check if the problem persists.
3. Fuser Unit: The fuser unit could be malfunctioning and may need to be replaced.
4. Paper Quality: Using low-quality or damp paper can cause shadows to appear on the printouts. Use high-quality, dry paper for better results.
5. Printer settings: Some printer settings can also cause shadows to appear, such as toner density or print resolution. Ensure that the settings are set to the recommended level.
6. Dust or debris: Dust or debris inside the printer can cause shadows, Clean the inside of the printer and check if the problem persists.

It is important to diagnose the specific cause of the problem before attempting to fix it. If you are not comfortable with troubleshooting the problem, it is best to contact HP support or a qualified technician for assistance.

Based on the symptoms you described, it sounds like there may be a timing issue with your Epson R1900 printer. The erratic spacing and repeated printing of the same image or text on the next line suggest that the paper advance mechanism is not functioning properly. This could be caused by a number of factors, including a worn or damaged paper feed roller, a misaligned paper feed mechanism, or a malfunctioning sensor that controls the paper advance timing.
To troubleshoot this issue, you can try the following steps:

1. Check the paper feed roller for wear or damage. If it is worn or damaged, it may need to be replaced.
2. Check that the paper is loaded correctly in the printer, and that it is not jammed or wrinkled.
3. Check that the paper thickness setting in the printer driver matches the paper you are using.
4. Clean the paper feed mechanism and paper feed roller with a soft, lint-free cloth.
5. Reset the printer by turning it off, unplugging it from the power source, and leaving it unplugged for at least 10 minutes before plugging it back in and turning it on again.

If none of these steps resolve the issue, you may need to take your printer to a qualified technician for repair or replacement of faulty parts.

If you are seeing vertical streaks/black lines your primary corona wire is dirty and or the fax scanner may be dirty.
1)To clean the corona wire you take the drum unit and toner cartridge and place it on disposable paper to avoid spilling.
2) Clean the primary corona wire inside the drum unit by sliding the blue tab from right to left several times.
3) Return the blue tab and snap it into the home position.
4) Reinstall the drum unit and toner cartridge.
5) Close the front cover.
Caution: if you do not return the blue tab to the home position it may repeat the black lines.

1. Open the Properties / Preferences window for the printer.
   
   

   For Windows 7
   

   • Click 'Start' from the bottom left of the Windows screen, and 'Devices and Printers .'
   • Click your right mouse button on the listing for your printer, and then select 'Printing Preferences...' from the menu that appears.
   
   For Windows Vista
   • Click / Select 'Start' from the bottom left of the Windows screen, 'Control Panel', 'Hardware and Sound', and then click on 'Printers'. Note: If you are in 'Classic' view, Click 'Printers' directly from the 'Control Panel'.
   • Click your right mouse button on the listing for your printer, and then select 'Printing Preferences...' from the menu that appears.
     

   For Windows XP Home Edition
   

   • Click / Select 'Start' from the bottom left of the Windows screen, 'Control Panel,' 'Printers and Other Hardware,' and 'Printers and Faxes.'
   • Click your right mouse button on the listing for your printer, and then select 'Printing Preferences...' from the menu that appears.

   
   For Windows XP Professional Edition
   

   • Click 'Start' from the bottom left of the Windows screen, and 'Printers and Faxes.'
   • Click your right mouse button on the listing for your printer, and then select 'Printing Preferences...' from the menu that appears.

   
   For Windows 2000/ Me/98 (if applicable)
   

   • Click / Select 'Start' from the bottom left of the Windows screen, and 'Settings,' then 'Printers.'
   • Click your right mouse button on the listing for your printer, and then select 'Properties' from the menu that appears.
     
     
2. Click on the Main tab.
   
   
3. Select 'Plain Paper' as the Media Type. If any other paper type is selected, color ink will be used to create black.
   
   
   
   Note: The pigment black ink will only be used when printing on plain paper.
   
   
4. De-Select the box for 'Grayscale Printing'.
   
   
   
   Note: If either 'Borderless Printing' or 'Duplex Printing' are enabled from the Page Setup tab, grayscale will be created using a combination of the color (dye) inks to prevent smearing.
   
   
5. Click 'OK' to save the changes.

The printer will now only use the pigment black ink tank.

Marks repeatedly appear at even intervals on the unprinted side of the page.

Internal parts might have toner on them. The problem typically corrects itself after a few more pages. The paper path might need cleaning. Click here to go to the Print Defect ruler for more information.

Clean the device. The imaging drum might be low. Click here to go to the Print Defect ruler for more information.

Replace the imaging drum. The fuser might be damaged. Click here to go to the Print Defect ruler for more information.

Contact HP Customer Care Marks repeatedly appear at even intervals on the unprinted side of the page.

Internal parts might have toner on them. The problem typically corrects itself after a few more pages. The paper path might need cleaning. Click here to go to the Print Defect ruler for more information.

Clean the device. The imaging drum might be low. Click here to go to the Print Defect ruler for more information.

Replace the imaging drum. The fuser might be damaged. Click here to go to the Print Defect ruler for more information.

Contact HP Customer Care hi at the link given below, click on it and locate the page (halfway down) where it states this
Marks repeatedly appear at even intervals on the unprinted side of the page.

Internal parts might have toner on them. The problem typically corrects itself after a few more pages. The paper path might need cleaning. Click here to go to the Print Defect ruler for more information.

Clean the device. The imaging drum might be low. Click here to go to the Print Defect ruler for more information.

Replace the imaging drum. The fuser might be damaged. Click here to go to the Print Defect ruler for more information.

Contact HP Customer Carehttp://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=ca&taskId=110&prodSeriesId=445194&prodTypeId=18972&prodSeriesId=445194&objectID=c00366102

use plane paper of 60-80 gsm if your printed paper is offset/screen print it will repeat and shadow appears because of high temprature in fussing unit.

Scaled printing To enlarge or reduce a printed document by specifying a percentage, select 'Scaled Printing'. You cannot use this setting with borderless printing.

1. Access the printing preferences by opening the printer Properties/ Preferences.
   
   For Windows Vista
   • Click/ Select 'Start' from the bottom left of the Windows screen, 'ControlPanel', 'Hardware and Sound', and then click on 'Printers'. Note: If you are in 'Classic' view, Click 'Printers' directly from the 'Control Panel'.
   • Click your right mouse button on the listing for your printer, and then select 'Properties' from the menu that appears.
     
   For Windows XP Home Edition
   
   • Click/ Select 'Start' from the bottom left of the Windows screen, 'ControlPanel,' 'Printers and Other Hardware,' and 'Printers and Faxes.'
   • Click your right mouse button on the listing for your printer, and then select 'Properties' from the menu that appears.
   
   For Windows XP Professional Edition
   
   • Click 'Start' from the bottom left of the Windows screen, and 'Printers and Faxes.'
   • Click your right mouse button on the listing for your printer, and then select 'Properties' from the menu that appears.
   
   For Windows 2000/Me/98
   
   • Click / Select 'Start' from the bottom left of the Windows screen, and 'Settings,' then 'Printers.'
   • Click your right mouse button on the listing for your printer, and then select 'Properties' from the menu that appears.
     
     
2. Select the 'Page Setup' tab and under 'Printing Type', select 'Scaled Printing'.
   
   
   
   
3. In'Page Size', select the paper size specified in the application. If youselect a size that cannot be selected in your printer, a message willdisplay informing you that the setting has been changed to'Fit-to-page' printing. Select 'Scaled Printing' again.
   
   
   
   
4. In 'Orientation', select the same orientation as specified in the application (either Portrait or Landscape).
   
   
   
   
5. In'Printer Paper Size', select the paper size loaded in the printer. In'Scaling', the magnification at which the document will print so as tofit exactly on the output paper size will appear as a reference value.
   
   
   
   
6. In 'Scaling', specify the percentage. You can select from 20% to 400%.
   
   
   
   
7. Click 'OK'.

I hope this information allows you to resolve this issue.
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It's probably a contamination problem but it could be mechanical.
Try this page: http://support.dell.com/support/topics/global.aspx/support/dsn/en/tree?c=us&journalid=6562681BAEE21456E040AE0AB6E1608F&l=en&s=gen&treeid=320898&Query=&SystemID=&ServiceTag=&contenttype=&os=&component=&lang=&doclang=&toggle=&dl=

Start by checking if the panel shows an error message (or not), then click Next.

See Charge roller my be dirty or Catriges PCU Units

Hi, The problem your having sounds like a Fuser . The Fuser will cause printed text to give a ghosting look down the page were it repeats itself.